This diet is designed to reduce the frequency and volume of fecal output while prolonging intestinal transit time. It may be used for a short time before transition to a low-fiber or regular diet. The terms "fiber" and "residue" may be used interchangeable. But technically, they're not the same thing. Fiber is the undigested part of plants that remains in the intestinal tract and contributes to stool. Residue includes fiber and any other foods that may increase stool output. The low-residue diet is similar to-but more restrictive than a low-fiber diet. Indigestible carbohydrate intake is reduced by limiting ingestion of fruits and vegetables to limited amounts of well cooked and canned vegetables and canned, cooked, or very ripe fruits, and by replacing whole-grain breads and cereals with refined products. Legumes, seeds and nuts are omitted.